MINNEAPOLIS — No one was hurt when a gunman sprayed rounds toward an emergency room entrance at Hennepin County Medical Center in downtown Minneapolis.

The gunfire erupted after a dispute between two groups of people at the hospital. Bullets shattered windows and hit an SUV during the middle of Tuesday afternoon at the busy intersection.

HCMC immediately went on lockdown as police quickly descended on the area around 3:15 p.m., roped off the crime scene and began looking for suspects.

A pile of 23 shell casings were left scattered on the street about 100 feet from the hospital entrance.

It’s the third gun-related incident near the hospital this year.